Home / 1,439.70-2,159.16-399.43

Finding the Fourth Proportional to 1,439.70, 2,159.16 and 399.43

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Solution

The fourth proportional to 1,439.70, 2,159.16 and 399.43 is: 599.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.70 : 2,159.16 = 399.43 : x
  2. Step 2: Convert to fraction form
    1,439.70/2,159.16 = 399.43/x
  3. Step 3: Cross multiply
    1,439.70x = 2,159.16 × 399.43
  4. Step 4: Simplify right side
    1,439.70x = 862,433.28
  5. Step 5: Solve for x
    x = 862,433.28/1,439.70
  6. Step 6: Final answer
    x = 599.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.